Computer help needed due to lightening strike

Had a bad storm last week in So Fla and lightening hit the pole outside our house zapping both the electric and telephone line.
The transformer box is charred black but was repaired and power restored after 12hrs... but the telephone line needed to be replaced from the pole to the house. AND it appeared to have run thru and zapped everything that was in its path. Our security system box was fried, computer modem fried, and wireless router fried. Replaced all and everything back to "normal" except for home computer connection.

It seems the Ethernet connection in back of computer wont accept a signal?
I plugged the cable into my laptops and it works fine, but when I plug it into the back of the home computer.... nothing.

The computer works fine and everything seems intact as far as programs/docs- but it just wont connect to the internet. Ive tried to go in and disable/enable and repair the connection, but nothing.

Seeing that the computer works fine Im assuming the motherboard is ok... is there a part that can be replaced (that may have shorted out) to accept the Ethernet connection?

Any help would be appreciated. Thanks!